Brake anchor



May 26, 1925. 1,539,529

c. J. WILKINSON BRAKE ANCHOR JIM I I v V 7, 6. a 35 ATTORAEYS.

CLEVELAND J. WILKINSON, 0F VENTURA, QALIFOR'NIQ BRAKE ANCHOR.

Application filed December 12, 1322. Serial No. 606,554.

To all whom it may concern:

Be it known that I, CLnvnLiwn lVVILKiN- son, a citizen of the United States, residing at Ventura, in the county of Ventura and State of California, have invented new and useful Improvements in Brake Anchors,

which the following is a specification.

This invention relates to brake anchors,

and particularly to with a brake band or eq uipment.

brake anchor for use brake bands in well The particular invention to be described in detail is used in combination with the brake wheel on the drum shaft associated with the draw works of well drilling apparatus.

At the present time,

is in position on the derrick after the draw works floor the drum is placed in position on the uprights and marks are made on the floor of the derrick which designate the point where holes should be bored through the derrick ing the brake band connections.

floor for plac- The drum is then removed from the uprights and rolled away so that the holes may be bored and after the boring of the holes the drum is rolled back and the brake band connections are run through the holes and locked to the floor. It will thus be seen that quite a good deal of work happens that the made on the floor, hand does not properly is required and it often marks are not properly with the result that the grip the brake wheel or broke wheels, and therefore does not hold the brake wheel properly. tempts My invention atto overcome the extra work required at the present time by providing what is known as a brake anchor which is adjustable, thus at all times ensuring that the brake band will properly engage the brake wheel. It is not necessary to perform several operations such as removing the drum,

rolling it to one side. and then rolling it back and attaching it to the uprights, tion, as the brake anchor to with my invene described may be placed in position on the derrick floor and fastened, the drum rolled into place and attached to the uprights and the band connected with the brake anchor at one end: the brake anchor being adjustable, will tighten the band to the proper extent.

The invention has for an object the provision of a brake anchor which is novel in construction, simple to install and which will perform its duties in an economical and efficient manner.

With the above and oth er objects in view,

scale, of the drum forming a part of the draw works shown in Figure 1, the said View being taken on the line 22 of Figure 1;

Figure 3 is a plan view of a plate member usedin practicing the invention;

Figure l is a fragmentary side elevation of features of the brake anchor, same being I on an enlarged scale;

Figure 5 is a fragmentary cross sectional View, on an enlarged scale, of a portion of the brake anchor and brake shaft, said view being taken on the line 5-5 of Figure 2 and looking in the direction of the appended arrows; and, I

Figure 6 is a fragmentary cross sectional view on an enlarged scale, of the connection for one end of the brake band, said view being taken on the line 6 6of Figure 2, and looking in the direction of the appended arrows.

Corresponding parts in all the figures are designated by the same reference characters.

Referring with particularity to the drawing, the draw Works is designated by A and said draw works in the showing of Figures 1 and 2 may include a drum member-a upon which the hoist cable may be wound, the said drum a being provided with the usual rake wheels 1 and 2, there being a drum shaft 3 adapted to be received within drum shaft bearings 4: and 5 mounted upon uprights 6 and 7. Adapted to pass around each brake wheel 1 and 2 is a brake band 6. It is customary in the present practice to connect one end of said band, as 8, with a suitable connection 9 to the floor of'tlie derricklO. This connection '9 includes a bolt me nber either passing through the floor, with a nut carried thereon for'tightening the same to the floor, or it may carry a plate which is screw-threaded for reception of the bolt with a lock nut on said bolt. As stated-in. the preamble, the other end of said band, as

11, is associated with a brake shaft 0, said brake shaft being shown in part on an enlarged scale in Figure 5. It is customary to mount this brake shaft in a suitable bearing associated with the uprights, and said brake shaft has the usual off-set or U-shaped portion 12 with which the connection 11 is .associated, so that rotation of the brake shaft will tend to tighten or loosen the brake band.

If the hole through which the connection 9 passes is not properly bored or placed at the right position, or if the brake shaft bearing mounted on the uprights is not in the proper position the brake band will not hold the drum. It is of course necessary in apparatus of this character which is used on the draw Works of rotary drilling apparatus, that the brake should hold in order to properly drill well holes. Serious results and accidents often happen from a brake band-slip ping. Furthermore, if the hole or holes for the brake band connections are not properly drilled to begin with, it is necessary in the present practice to remove the brake shaft from its bearings and roll the drum to one side while new holes are bored, for the very reason that the holes or certain of the holes must be beneath the brake wheelsof the brake drums and the brake wheels being large are in the way of any drilling apparatus. With -my invention a hole may bebored for reception of the connector 9, if desired. However, I provide a slightly different construction in my device which facilitates more rapid adjusting of the brake band, and I have illustrated my brake anchor in detail in Figures 3, 4, 5 and 6. The brake anchor is designated as an entirety by B and said brake-anchor includes a plate member dwhich is adapted to be fastened to the floor 10 of the derrick by means of a bolt 13 passing through an opening in a lug 14 0f the plate d. The plate d likewise is formed with elongated slots 15, 16, 17 and 18 with bearing surfaces 19 surrounding the slots 15 and 16 and serrated or teeth portions 20 transversely paralleling the slots 17 and 18. The plate d is placed immediately beneath the drum 1 or 2 and the connector 9 associated with one end of the band 8 includes a cross-piece 21 received within a loop formed in the band, said cross-piece having its terminal portions provided with openings, with bolts 22 and 23 adapted to be received in said openings, the bolt- 22 being receivable within the slot 15 of the plate 61 and the bolt 23 being receivable within the slot 16 of said plate. The plate 03 is provided with channels 24 .and 25 in alignment with the slots 15 and 16 respectively, and the head of each bolt, 26 and 27, respectively, is adapted to' travel within said channels. Each bolt may carry lock nuts 28 and 29, the lock nuts 29 bearing against the surfaces 19, while the nuts 28 may hold the piece 21 to the bolts 22 and 23 respectively. The second part of the brake anchor B is designated by e, and includes a bearing 30 provided with two lugs 3l and 32 with the base of said lugs serrated or formed with teeth 33. Said lugs 31 and 32 are each bored for reception of'bolts 34. One part of the bearing 30 is of half ring formation, as shown at 30 with a small in-set part 30*, the inset likewise being provided with teeth, as shown at 33. provided, as shown in Figure 5 and the bolts 34 are adapted to pass through the slots 18 for one member 6 and the slots 17 for the other member 6, as illustrated in said figure. The offset or U-shaped portion 12 of the shaft 0 is interposed between the two -members 0. Each bolt 34 carries a locking nut 35. By loosening said nuts 35 it is possible to raise the bearing 30 so that the teeth 33 may be freed from the teeth 20, and thus adjust the position of the shaft 0. The brake shaft 0 includes the usual brake arm 36. a "-3 The operation of the device is as follows:

Assuming that the draw works is in position with the brake drum and its shaft mounted with bearings on the uprights of said draw works, it is only necessary to provide one or two of the brake anchors B, depending upon whether or not one or two brake wheels are to be used. Instead of marking positions on the floor which are to be bored for the reception of brake band connectors, the anchor plate at is placed in position beneath the brake wheel or brake wheels preferably to one side of the vertical axis thereof, as illustrated in Figure 2, and the connector 9is joined with the end 8 of one of the brake bands, said connector being loosely received Within the slots 15 and 16 of said plate d, which is to say, the nuts 29 are not tightened upon the bolts 22 and 23, this permitting relative movement of the nuts within the slots 15 and 16. j The connector 11 is slipped over the part 12 of the brake shaft. The member 0 is loose or free from the serrated or tooth portions 20. The shaft 0 is then placed within the bearing 30 by removing the member 30 so that the shaft may be received within the part 30,

whereupon the part 30" is replaced. The

member a may then be placed upon the serrated portion 20 and v the nuts 35 screwthreaded upon the bolts 34. Assuming that only one brake wheel is used two of the members 6 are of course provided, as shown in Figure 5, and they are so adjusted that a movement of the brake shaft by moving the brake arm 36 will properly tighten the band 6 upon the brake wheel. In this connection it is to be noted that movement of the brake arm will tend to straighten that portion of the brake band which is joined with the connector 9, so that there will be a straight pull Two of the members .0 are.

upward. This is essential in order to get the best results in braking action, and the slots and 16 permit the connector to so adjust itself that there will be a straight pull upward from said connector to a portion of the periphery of the brake wheel. If the members 6 have not been properly adjusted so that a proper braking action takes place, or the hand does not properly loosen from the periphery of the brake wheel, it is only necessary to loosen the nuts and lift the bearing member 30 so that the serr ted base thereof 33 may disengage the serrations 20.

The bearing 30 may then be moved to an other position and looked as before without any fear of the same slipping when so locked. It will thus be seen that I have provided a construction which is novel in many particulars, which is easy to install and only requires one man to place the same in position for service.

It is obvious that various changes, modifications and variations may be made in practicing the invention, in departure from the description as given, but that said changes, modifications and variations may be made within a fair interpretation of the invent-ion as defined by the scope of the appended claims.

Having thus disclosed my invention, I claim and desire to secure by Letters Patent:

1. In a device of the character disclosed, the combination with a brake band, of an anchor plate and means between the anchor plate and ends of the brake band for securing said brake band to the anchor plate; said means including a bearing member, a portion of which is serrated.

2. In a. device of the character disclosed, the combination with a brake band, of an anchor plate, and means between the anchor plate and ends of the brake band for securing said brake band to the anchor plate; said means including a bearing member, a portion of which is serrated; and said anchor plate having a portion thereof serrated for cooperation with the serrations of the bearing member.

3. In a device of the character disclosed, the combination with a brake band, of an anchor plate, and means between the anchor plate and ends of the brake band for securing said brake band to the anchor plate: said means including a bearing, a portion of which is serrated; and said anchor plate having a portion thereof serrated for cooperation with the serrations of the bearing,

and means for adjustably maintaining said bearing in position of service.

4. In a device of the character disclosed, the combination with a brake band, of an anchor plate, and means between the anchor plate and ends of the brake band for securing said brake" band to the anchor plate; said anchor plate being for ned with a series of slots and said means for securing the brake band being received within said slots.

5. In a device of the character disclosed, the combination with a brake band, of a hearing member, a brake shaft carried within said bearing member, said brclze band being secured at one end thereof to said brake shaft; there being means for securing said bearing member to said anchor plate; said means permitting relative movement of said bearing member upon said anchor plate.

6. In a device of the character disclosed, the combination with a brake band, of a bearing member, a brake shaft carried within said bearing member, said b alre band being secured at one end thereof to said brake shaft; there being means for securing said bearing member to said anchor plate; said means permitting relative movement of said bearing member upon said anchor plate; said anchor plate and said bearing being formed with teeth adapted to cooperate to hold the said bearing and said anchor plate in an adjusted position.

7. In a device of the character disclosed, the combination with a brake band, of an anchor plate formed with an elongated slot and means between said anchor plate and said brake band for securing said brake band; said means including a connector formed to be received in part within the elongated slot engagement on said anchor plate.

8. In a device of the character disclosed, the combination with abrake band, of an anchor plate and means between said anchor plate and said brake band for securing said brake band thereto; said means including a connector adapted for slidable engagement on said anchor plate; said anchor plate being provided with two parallel slots and said connector being provided with means freely movable within said slots.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

CLEVELAND J. WILKINSON.

Witnesses D. S. PENFIELD, R. O. RonINsoN, Jr. 

